Diagnostic Value of TransrectaI US in Prostate Cancer and Usefulness of TransperineaI Prostate Biopsy UsingAutomated Biopsy Gun

Choi, Dae Seob; Kim, Seung Hyup; Lee, Hak Jong; Yeon, Kyung Mo; Lee, Sang Eun; Lee, Chongwook; Kim, Si Whang

Journal of Korean Society of Medical Ultrasound 1995;14(1): 43-48.

Dae Seob Choi, Seung Hyup Kim, Hak Jong Lee, Kyung Mo Yeon, Sang Eun Lee, Chongwook Lee, Si Whang Kim

Department of Radiology, Urology1, Seoul National University College of Mdicine

ABSTRACT

We performed this retrospective study to evaluate the diagnostic value of transrectal ultrasound(TRUS) forprostate cancer and the usefulness of TRUS-guided transperineal prostate biopsy. Fifty patierrts underwentTRUS-guided transperineal prostate biopsy by using automated biopsy gun mounted with 18-gauge, 10cm biopsy needle.The patients were examined with 5MHz transducer in the longitudinal and transverse planes. US criterion forprostate cancer was a typoechoic nodule located in the peripheral zone of the prostate. Fifty-nine biopsies weredone in fifty patients. Sufficient tissue for the histopathologic diagnosis was obtained from forty-nineprocedures(96%). Histopathologically, there were 18 cases(37%) of cancer, 21(43%) nodular hyperplasia, five(10%)inflammation, one(2%) fibrosis, and four(8%) mormal. The sensitivity, specificity, positive predictive value,negative predictive value, and diagnostic accuracy of TRUS for cancer were 83, 74, 65, 88, and 78%, respectively.There was no significant complication related to the procedure. TRUS-guided transperineal proatate biopsy usingautomated biopsy gun is a safe procedure with fairly high diagnostic value.

Keywords: Prostate. neoplasm Prostate. transcrectal ultrasound Prostate. biopsy